Rightmove might have to lower its prices, an analyst has said.

Investment website The Motley Fool has made the prediction following the decision of Rightmove chairman Scott Forbes to sell off half his shares in the company.

It says that Rightmove’s shares could crash.

The Motley Fool has also warned that Foxtons’ shares could be “highly susceptible”.

In a move that was always going to raise City eyebrows, Forbes reportedly wanted to raise funds for a house purchase in Kensington.

However, he could have made more money from his shares if he had sold them back in January (when the house he is apparently buying would probably also have cost a lot less).

The sale of Rightmove shares, netting Forbes £7m, had the almost inevitable effect of making the company’s shares fall further.

Cue for the City analysts to move in and take a closer look.

And this is what The Motley Fool makes of it.

In an article headed “Unsupportable profits?” writer Roland Head says: “Rightmove reported an underlying operating margin of 74.3% in 2013. That’s an incredible level of profitability – Rightmove is basically charging through the nose for a service that costs very little to supply.

“The reason Rightmove can do this is that it has the lion’s share of the market; if your property isn’t listed on Rightmove, many people won’t see it. However, things can change fast online, and exceptionally high profit margins such as these are rarely sustainable in the long term.”

The article goes on to query whether Zoopla and Rightmove’s “cosy stranglehold” on the market can continue in the light of the launch of Agents’ Mutual in January.

Agents’ Mutual, says the piece, has commitments from agents representing 12% of the listings market. Not huge perhaps – but could it be enough to “force Rightmove to cut its prices”, as the article suggests?

In a separate article on the site, Rupert Hargreaves also expresses concerns about the Rightmove share price. He also points out that Foxtons’ shares are currently trading at 21 times valuation.

“If London’s property market takes a turn for the worst, Foxtons’ management is going to have to work hard to convince the market that the company is worth this lofty valuation,” warns Hargreaves.

Separately, Eye was intrigued by a comment from one of our readers, Nick Churton, of the Mayfair Office.

In the wake of the recent elections, Churton said: “The established parties – hitherto secure in a comfortable two-party system – are now worried about a significant number of their key supporters ebbing away and transferring their allegiances to a fresh-faced newcomer.

“After years of refusing to listen to popular opinion, the big two are suddenly confused and worried about the future.

“No, this is not about UKIP. It is about Agents’ Mutual. People power can work. There just have to be enough people at their wit’s end to make a stand. That is the way political and commercial earthquakes happen. Just look at UKIP.”

The Motley Fool articles are here:

http://www.fool.co.uk/investing/2014/05/29/3-reasons-why-rightmove-plc-could-be-the-next-internet-stock-to-crash/

http://www.fool.co.uk/investing/2014/05/30/watch-out-below-these-property-stocks-could-be-set-for-a-tumble/